Carrier 07KA - Manual (Page 3)

5. Shut unit off and front-seat suction valve.
6. Vent remaining pressure to atmosphere.
NOTE; The 07KA condenser will not hold a com­
plete system refrigerant charge. At 120 F con­
densing temperature the condenser will hold
approximately 2 ib of refrigerant 22.
PRESSURE RELIEF PLUG
This plug is a protective device which melts
at 200 F, relieving excess system pressure. Re­
move when soldering on suction tube. For plug
replacement order Carrier part no. EK02JA203.
COMPATIBLE FITTING REPAIR
Leaking Mechanical Connection - Front-seat con­
densing unit service valves and relieve refrigerant
pressure in tubing. Back lock nut off compatible
fitting onto tube. Cut fitting with hacksaw between
threads and seal ring bead as shown in Fig. 2.
Remove
tubing section remaining in threaded
portion of fitting. Discard lock nut.
Clean, flux and insert new tube end into re­
maining portion of compatible fitting. Heat and
apply low-temperature (450 F) solder.
CAUTION: Service valves have teflon washer.
Do not overtighten (finger pressure will seal)
or overheat. Do not exceed 10 ft-lb torque
when tightening and wrap valve base in wet rag
when soldering.
Leaking Sweat Connection - Front-seat service
valves and relieve refrigerant pressure in tubing.
Clean and flux area around leak and apply low-
temperature (450 F) solder.
Evacuate or purge evaporator coil and tubing
system. Add refrigerant charge (see charging
instructions).
Fig. 2 - Repair of Mechanicai Connection
CONDENSER
If excessive discharge pressure is experienced
with normal water flow, the condenser tubes may
be fouled and require cleaning. Contact a local
water
treatment firm for details on chemical
cleaning.
LUBRICATION
Compressor contains factory oil charge. When
oil is lost, see Table 1 for oil charge and Carrier
Standard Service Techniques Manual, Chapter 1,
page 1-21 for instructions.